Efficiency enhancement in regenerative amplifier free-electron lasers using a tapered undulator
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866929657767526400 |
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| author | Freund, Henry van der Slot, Peter O'Shea, Patrick |
| author_facet | Freund, Henry van der Slot, Peter O'Shea, Patrick |
| contents | Recent progress in short wavelength free-electron lasers extending from the extreme ultraviolet through the x-ray regime have opened new avenues for industrial and research applications. A high-gain/low-Q oscillator, i.e., a regenerative amplifier free-electron laser (RAFEL), is one possible concept. In this paper, we present the first analysis of efficiency enhancement in a RAFEL with a long, tapered undulator line. For the present analysis, we consider a high average power EUV RAFEL at 13.5 nm and show that the performance exceeds that of single-pass, tapered self-amplified spontaneous emission. This points the way to high power tapered undulator x-ray RAFELs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_01911 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Efficiency enhancement in regenerative amplifier free-electron lasers using a tapered undulator Freund, Henry van der Slot, Peter O'Shea, Patrick Optics Accelerator Physics Recent progress in short wavelength free-electron lasers extending from the extreme ultraviolet through the x-ray regime have opened new avenues for industrial and research applications. A high-gain/low-Q oscillator, i.e., a regenerative amplifier free-electron laser (RAFEL), is one possible concept. In this paper, we present the first analysis of efficiency enhancement in a RAFEL with a long, tapered undulator line. For the present analysis, we consider a high average power EUV RAFEL at 13.5 nm and show that the performance exceeds that of single-pass, tapered self-amplified spontaneous emission. This points the way to high power tapered undulator x-ray RAFELs. |
| title | Efficiency enhancement in regenerative amplifier free-electron lasers using a tapered undulator |
| topic | Optics Accelerator Physics |
| url | https://arxiv.org/abs/2501.01911 |